Reply To: what year did champion discontinue J6J spark plug

Home › Forum › Ask A Member › what year did champion discontinue J6J spark plug › Reply To: what year did champion discontinue J6J spark plug

April 11, 2021 at 11:27 am #236156
olcah
Participant

    US Member

    Having run both J6C and B6S plugs in 1956 Johnson 30 HP motors, either will work fine but the B6S seem to run a bit cleaner longer. No performance advantage between J6J and J6C plugs. The top electrode on the J6J extends only half way across the vertical electrode. I was told this was to minimize fouling bridging the electrode gap. That does not occur anymore with the newer TCW3 oils.